Applause
We all like a good prank. Well, not all of us, but most of us appreciate the time and effort it takes to come up with a good practical joke. The salt for sugar swap, for example, crazy gluing someone’s phone, or indeed this guy’s attempt to confuse his wife.
The first time she woke to applause and he explained it to her, she probably thought it was quite funny. The 2nd time, she may have chuckled wryly. As time went on, however, the joke got less and less funny. Now she’s just stuck with never falling asleep in a public place in case someone runs over and starts giving her mouth to mouth.